66110623 has 4 divisors (see below), whose sum is σ = 67517280. Its totient is φ = 64703968.

The previous prime is 66110587. The next prime is 66110647. The reversal of 66110623 is 32601166.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 66110623 - 2¹³ = 66102431 is a prime.

It is a super-2 number, since 2×66110623² = 8741228946896258, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66116623) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 703258 + ... + 703351.

It is an arithmetic number, because the mean of its divisors is an integer number (16879320).

Almost surely, 2^66110623 is an apocalyptic number.

66110623 is a deficient number, since it is larger than the sum of its proper divisors (1406657).

66110623 is a wasteful number, since it uses less digits than its factorization.

66110623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1406656.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 66110623 is about 8130.8439291380. The cubic root of 66110623 is about 404.3496609294.

Adding to 66110623 its reverse (32601166), we get a palindrome (98711789).

The spelling of 66110623 in words is "sixty-six million, one hundred ten thousand, six hundred twenty-three".